Hi Sabby,
What you're describing is an infrequently recurring problem with Adobe Dreamweaver, and is usually quickly fixed by deleting a Dreamweaver configuration cache file.
If you click the 'Common Installation Issues' link (at the top right of this page), and follow the exact instructions for deleting the WinFileCache.dat file, that should sort your problem. (Make sure Dreamweaver is closed when you remove it).
If it doesn't solve the problem, please post back again.